kevin/linux
1
Fork 0
Code

crypto: ablkcipher - remove deprecated and unused ablkcipher support

Browse Source 
Now that all users of the deprecated ablkcipher interface have been
moved to the skcipher interface, ablkcipher is no longer used and
can be removed.

Reviewed-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2019-11-09 18:09:53 +01:00 committed by Herbert Xu
parent 809abaefa4
commit d63007eb95
16 changed files with 4 additions and 1150 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
Documentation/crypto/api-skcipher.rst
View File

@ -5,7 +5,7 @@ Block Cipher Algorithm Definitions
:doc: Block Cipher Algorithm Definitions
.. kernel-doc:: include/linux/crypto.h
:functions: crypto_alg ablkcipher_alg cipher_alg compress_alg
:functions: crypto_alg cipher_alg compress_alg
Symmetric Key Cipher API
------------------------
@ -33,21 +33,3 @@ Single Block Cipher API
.. kernel-doc:: include/linux/crypto.h
:functions: crypto_alloc_cipher crypto_free_cipher crypto_has_cipher crypto_cipher_blocksize crypto_cipher_setkey crypto_cipher_encrypt_one crypto_cipher_decrypt_one
Asynchronous Block Cipher API - Deprecated
------------------------------------------
.. kernel-doc:: include/linux/crypto.h
:doc: Asynchronous Block Cipher API
.. kernel-doc:: include/linux/crypto.h
:functions: crypto_free_ablkcipher crypto_ablkcipher_ivsize crypto_ablkcipher_blocksize crypto_ablkcipher_setkey crypto_ablkcipher_reqtfm crypto_ablkcipher_encrypt crypto_ablkcipher_decrypt
Asynchronous Cipher Request Handle - Deprecated
-----------------------------------------------
.. kernel-doc:: include/linux/crypto.h
:doc: Asynchronous Cipher Request Handle
.. kernel-doc:: include/linux/crypto.h
:functions: crypto_ablkcipher_reqsize ablkcipher_request_set_tfm ablkcipher_request_alloc ablkcipher_request_free ablkcipher_request_set_callback ablkcipher_request_set_crypt

2
Documentation/crypto/architecture.rst
View File

@ -201,8 +201,6 @@ the aforementioned cipher types:
- CRYPTO_ALG_TYPE_AEAD Authenticated Encryption with Associated Data
(MAC)
- CRYPTO_ALG_TYPE_ABLKCIPHER Asynchronous multi-block cipher
- CRYPTO_ALG_TYPE_KPP Key-agreement Protocol Primitive (KPP) such as
an ECDH or DH implementation

4
Documentation/crypto/crypto_engine.rst
View File

@ -63,8 +63,6 @@ request by using:
When your driver receives a crypto_request, you must to transfer it to
the crypto engine via one of:
* crypto_transfer_ablkcipher_request_to_engine()
* crypto_transfer_aead_request_to_engine()
* crypto_transfer_akcipher_request_to_engine()
@ -75,8 +73,6 @@ the crypto engine via one of:
At the end of the request process, a call to one of the following functions is needed:
* crypto_finalize_ablkcipher_request()
* crypto_finalize_aead_request()
* crypto_finalize_akcipher_request()

4
crypto/Makefile
View File

@ -16,9 +16,7 @@ obj-$(CONFIG_CRYPTO_ALGAPI2) += crypto_algapi.o
obj-$(CONFIG_CRYPTO_AEAD2) += aead.o
obj-$(CONFIG_CRYPTO_AEAD2) += geniv.o
crypto_skcipher-y := ablkcipher.o
crypto_skcipher-y += skcipher.o
obj-$(CONFIG_CRYPTO_SKCIPHER2) += crypto_skcipher.o
obj-$(CONFIG_CRYPTO_SKCIPHER2) += skcipher.o
obj-$(CONFIG_CRYPTO_SEQIV) += seqiv.o
obj-$(CONFIG_CRYPTO_ECHAINIV) += echainiv.o

407
crypto/ablkcipher.c
View File

@ -1,407 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Asynchronous block chaining cipher operations.
*
* This is the asynchronous version of blkcipher.c indicating completion
* via a callback.
*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <crypto/internal/skcipher.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/scatterwalk.h>
#include "internal.h"
struct ablkcipher_buffer {
struct list_head entry;
struct scatter_walk dst;
unsigned int len;
void *data;
};
enum {
ABLKCIPHER_WALK_SLOW = 1 << 0,
};
static inline void ablkcipher_buffer_write(struct ablkcipher_buffer *p)
{
scatterwalk_copychunks(p->data, &p->dst, p->len, 1);
}
void __ablkcipher_walk_complete(struct ablkcipher_walk *walk)
{
struct ablkcipher_buffer *p, *tmp;
list_for_each_entry_safe(p, tmp, &walk->buffers, entry) {
ablkcipher_buffer_write(p);
list_del(&p->entry);
kfree(p);
}
}
EXPORT_SYMBOL_GPL(__ablkcipher_walk_complete);
static inline void ablkcipher_queue_write(struct ablkcipher_walk *walk,
struct ablkcipher_buffer *p)
{
p->dst = walk->out;
list_add_tail(&p->entry, &walk->buffers);
}
/* Get a spot of the specified length that does not straddle a page.
* The caller needs to ensure that there is enough space for this operation.
*/
static inline u8 *ablkcipher_get_spot(u8 *start, unsigned int len)
{
u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);
return max(start, end_page);
}
static inline void ablkcipher_done_slow(struct ablkcipher_walk *walk,
unsigned int n)
{
for (;;) {
unsigned int len_this_page = scatterwalk_pagelen(&walk->out);
if (len_this_page > n)
len_this_page = n;
scatterwalk_advance(&walk->out, n);
if (n == len_this_page)
break;
n -= len_this_page;
scatterwalk_start(&walk->out, sg_next(walk->out.sg));
}
}
static inline void ablkcipher_done_fast(struct ablkcipher_walk *walk,
unsigned int n)
{
scatterwalk_advance(&walk->in, n);
scatterwalk_advance(&walk->out, n);
}
static int ablkcipher_walk_next(struct ablkcipher_request *req,
struct ablkcipher_walk *walk);
int ablkcipher_walk_done(struct ablkcipher_request *req,
struct ablkcipher_walk *walk, int err)
{
struct crypto_tfm *tfm = req->base.tfm;
unsigned int n; /* bytes processed */
bool more;
if (unlikely(err < 0))
goto finish;
n = walk->nbytes - err;
walk->total -= n;
more = (walk->total != 0);
if (likely(!(walk->flags & ABLKCIPHER_WALK_SLOW))) {
ablkcipher_done_fast(walk, n);
} else {
if (WARN_ON(err)) {
/* unexpected case; didn't process all bytes */
err = -EINVAL;
goto finish;
}
ablkcipher_done_slow(walk, n);
}
scatterwalk_done(&walk->in, 0, more);
scatterwalk_done(&walk->out, 1, more);
if (more) {
crypto_yield(req->base.flags);
return ablkcipher_walk_next(req, walk);
}
err = 0;
finish:
walk->nbytes = 0;
if (walk->iv != req->info)
memcpy(req->info, walk->iv, tfm->crt_ablkcipher.ivsize);
kfree(walk->iv_buffer);
return err;
}
EXPORT_SYMBOL_GPL(ablkcipher_walk_done);
static inline int ablkcipher_next_slow(struct ablkcipher_request *req,
struct ablkcipher_walk *walk,
unsigned int bsize,
unsigned int alignmask,
void **src_p, void **dst_p)
{
unsigned aligned_bsize = ALIGN(bsize, alignmask + 1);
struct ablkcipher_buffer *p;
void *src, *dst, *base;
unsigned int n;
n = ALIGN(sizeof(struct ablkcipher_buffer), alignmask + 1);
n += (aligned_bsize * 3 - (alignmask + 1) +
(alignmask & ~(crypto_tfm_ctx_alignment() - 1)));
p = kmalloc(n, GFP_ATOMIC);
if (!p)
return ablkcipher_walk_done(req, walk, -ENOMEM);
base = p + 1;
dst = (u8 *)ALIGN((unsigned long)base, alignmask + 1);
src = dst = ablkcipher_get_spot(dst, bsize);
p->len = bsize;
p->data = dst;
scatterwalk_copychunks(src, &walk->in, bsize, 0);
ablkcipher_queue_write(walk, p);
walk->nbytes = bsize;
walk->flags |= ABLKCIPHER_WALK_SLOW;
*src_p = src;
*dst_p = dst;
return 0;
}
static inline int ablkcipher_copy_iv(struct ablkcipher_walk *walk,
struct crypto_tfm *tfm,
unsigned int alignmask)
{
unsigned bs = walk->blocksize;
unsigned int ivsize = tfm->crt_ablkcipher.ivsize;
unsigned aligned_bs = ALIGN(bs, alignmask + 1);
unsigned int size = aligned_bs * 2 + ivsize + max(aligned_bs, ivsize) -
(alignmask + 1);
u8 *iv;
size += alignmask & ~(crypto_tfm_ctx_alignment() - 1);
walk->iv_buffer = kmalloc(size, GFP_ATOMIC);
if (!walk->iv_buffer)
return -ENOMEM;
iv = (u8 *)ALIGN((unsigned long)walk->iv_buffer, alignmask + 1);
iv = ablkcipher_get_spot(iv, bs) + aligned_bs;
iv = ablkcipher_get_spot(iv, bs) + aligned_bs;
iv = ablkcipher_get_spot(iv, ivsize);
walk->iv = memcpy(iv, walk->iv, ivsize);
return 0;
}
static inline int ablkcipher_next_fast(struct ablkcipher_request *req,
struct ablkcipher_walk *walk)
{
walk->src.page = scatterwalk_page(&walk->in);
walk->src.offset = offset_in_page(walk->in.offset);
walk->dst.page = scatterwalk_page(&walk->out);
walk->dst.offset = offset_in_page(walk->out.offset);
return 0;
}
static int ablkcipher_walk_next(struct ablkcipher_request *req,
struct ablkcipher_walk *walk)
{
struct crypto_tfm *tfm = req->base.tfm;
unsigned int alignmask, bsize, n;
void *src, *dst;
int err;
alignmask = crypto_tfm_alg_alignmask(tfm);
n = walk->total;
if (unlikely(n < crypto_tfm_alg_blocksize(tfm))) {
req->base.flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
return ablkcipher_walk_done(req, walk, -EINVAL);
}
walk->flags &= ~ABLKCIPHER_WALK_SLOW;
src = dst = NULL;
bsize = min(walk->blocksize, n);
n = scatterwalk_clamp(&walk->in, n);
n = scatterwalk_clamp(&walk->out, n);
if (n < bsize ||
!scatterwalk_aligned(&walk->in, alignmask) ||
!scatterwalk_aligned(&walk->out, alignmask)) {
err = ablkcipher_next_slow(req, walk, bsize, alignmask,
&src, &dst);
goto set_phys_lowmem;
}
walk->nbytes = n;
return ablkcipher_next_fast(req, walk);
set_phys_lowmem:
if (err >= 0) {
walk->src.page = virt_to_page(src);
walk->dst.page = virt_to_page(dst);
walk->src.offset = ((unsigned long)src & (PAGE_SIZE - 1));
walk->dst.offset = ((unsigned long)dst & (PAGE_SIZE - 1));
}
return err;
}
static int ablkcipher_walk_first(struct ablkcipher_request *req,
struct ablkcipher_walk *walk)
{
struct crypto_tfm *tfm = req->base.tfm;
unsigned int alignmask;
alignmask = crypto_tfm_alg_alignmask(tfm);
if (WARN_ON_ONCE(in_irq()))
return -EDEADLK;
walk->iv = req->info;
walk->nbytes = walk->total;
if (unlikely(!walk->total))
return 0;
walk->iv_buffer = NULL;
if (unlikely(((unsigned long)walk->iv & alignmask))) {
int err = ablkcipher_copy_iv(walk, tfm, alignmask);
if (err)
return err;
}
scatterwalk_start(&walk->in, walk->in.sg);
scatterwalk_start(&walk->out, walk->out.sg);
return ablkcipher_walk_next(req, walk);
}
int ablkcipher_walk_phys(struct ablkcipher_request *req,
struct ablkcipher_walk *walk)
{
walk->blocksize = crypto_tfm_alg_blocksize(req->base.tfm);
return ablkcipher_walk_first(req, walk);
}
EXPORT_SYMBOL_GPL(ablkcipher_walk_phys);
static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen)
{
struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
int ret;
u8 *buffer, *alignbuffer;
unsigned long absize;
absize = keylen + alignmask;
buffer = kmalloc(absize, GFP_ATOMIC);
if (!buffer)
return -ENOMEM;
alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
memcpy(alignbuffer, key, keylen);
ret = cipher->setkey(tfm, alignbuffer, keylen);
memset(alignbuffer, 0, keylen);
kfree(buffer);
return ret;
}
static int setkey(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen)
{
struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
if ((unsigned long)key & alignmask)
return setkey_unaligned(tfm, key, keylen);
return cipher->setkey(tfm, key, keylen);
}
static unsigned int crypto_ablkcipher_ctxsize(struct crypto_alg *alg, u32 type,
u32 mask)
{
return alg->cra_ctxsize;
}
static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type,
u32 mask)
{
struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
if (alg->ivsize > PAGE_SIZE / 8)
return -EINVAL;
crt->setkey = setkey;
crt->encrypt = alg->encrypt;
crt->decrypt = alg->decrypt;
crt->base = __crypto_ablkcipher_cast(tfm);
crt->ivsize = alg->ivsize;
return 0;
}
#ifdef CONFIG_NET
static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
{
struct crypto_report_blkcipher rblkcipher;
memset(&rblkcipher, 0, sizeof(rblkcipher));
strscpy(rblkcipher.type, "ablkcipher", sizeof(rblkcipher.type));
strscpy(rblkcipher.geniv, "<default>", sizeof(rblkcipher.geniv));
rblkcipher.blocksize = alg->cra_blocksize;
rblkcipher.min_keysize = alg->cra_ablkcipher.min_keysize;
rblkcipher.max_keysize = alg->cra_ablkcipher.max_keysize;
rblkcipher.ivsize = alg->cra_ablkcipher.ivsize;
return nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
sizeof(rblkcipher), &rblkcipher);
}
#else
static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
{
return -ENOSYS;
}
#endif
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
__maybe_unused;
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;
seq_printf(m, "type : ablkcipher\n");
seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ?
"yes" : "no");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize);
seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize);
seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize);
seq_printf(m, "geniv : <default>\n");
}
const struct crypto_type crypto_ablkcipher_type = {
.ctxsize = crypto_ablkcipher_ctxsize,
.init = crypto_init_ablkcipher_ops,
#ifdef CONFIG_PROC_FS
.show = crypto_ablkcipher_show,
#endif
.report = crypto_ablkcipher_report,
};
EXPORT_SYMBOL_GPL(crypto_ablkcipher_type);

26
crypto/algapi.c
View File

@ -1052,32 +1052,6 @@ void crypto_stats_get(struct crypto_alg *alg)
}
EXPORT_SYMBOL_GPL(crypto_stats_get);
void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret,
struct crypto_alg *alg)
{
if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
atomic64_inc(&alg->stats.cipher.err_cnt);
} else {
atomic64_inc(&alg->stats.cipher.encrypt_cnt);
atomic64_add(nbytes, &alg->stats.cipher.encrypt_tlen);
}
crypto_alg_put(alg);
}
EXPORT_SYMBOL_GPL(crypto_stats_ablkcipher_encrypt);
void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret,
struct crypto_alg *alg)
{
if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
atomic64_inc(&alg->stats.cipher.err_cnt);
} else {
atomic64_inc(&alg->stats.cipher.decrypt_cnt);
atomic64_add(nbytes, &alg->stats.cipher.decrypt_tlen);
}
crypto_alg_put(alg);
}
EXPORT_SYMBOL_GPL(crypto_stats_ablkcipher_decrypt);
void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg,
int ret)
{

29
crypto/crypto_engine.c
View File

@ -213,20 +213,6 @@ static int crypto_transfer_request_to_engine(struct crypto_engine *engine,
return crypto_transfer_request(engine, req, true);
}
/**
* crypto_transfer_ablkcipher_request_to_engine - transfer one ablkcipher_request
* to list into the engine queue
* @engine: the hardware engine
* @req: the request need to be listed into the engine queue
* TODO: Remove this function when skcipher conversion is finished
*/
int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
struct ablkcipher_request *req)
{
return crypto_transfer_request_to_engine(engine, &req->base);
}
EXPORT_SYMBOL_GPL(crypto_transfer_ablkcipher_request_to_engine);
/**
* crypto_transfer_aead_request_to_engine - transfer one aead_request
* to list into the engine queue
@ -279,21 +265,6 @@ int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
}
EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_request_to_engine);
/**
* crypto_finalize_ablkcipher_request - finalize one ablkcipher_request if
* the request is done
* @engine: the hardware engine
* @req: the request need to be finalized
* @err: error number
* TODO: Remove this function when skcipher conversion is finished
*/
void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
struct ablkcipher_request *req, int err)
{
return crypto_finalize_request(engine, &req->base, err);
}
EXPORT_SYMBOL_GPL(crypto_finalize_ablkcipher_request);
/**
* crypto_finalize_aead_request - finalize one aead_request if
* the request is done

106
crypto/skcipher.c
View File

@ -580,9 +580,6 @@ EXPORT_SYMBOL_GPL(skcipher_walk_aead_decrypt);
static unsigned int crypto_skcipher_extsize(struct crypto_alg *alg)
{
if (alg->cra_type == &crypto_ablkcipher_type)
return sizeof(struct crypto_ablkcipher *);
return crypto_alg_extsize(alg);
}
@ -592,106 +589,6 @@ static void skcipher_set_needkey(struct crypto_skcipher *tfm)
crypto_skcipher_set_flags(tfm, CRYPTO_TFM_NEED_KEY);
}
static int skcipher_setkey_ablkcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
{
struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
struct crypto_ablkcipher *ablkcipher = *ctx;
int err;
crypto_ablkcipher_clear_flags(ablkcipher, ~0);
crypto_ablkcipher_set_flags(ablkcipher,
crypto_skcipher_get_flags(tfm) &
CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(ablkcipher, key, keylen);
crypto_skcipher_set_flags(tfm,
crypto_ablkcipher_get_flags(ablkcipher) &
CRYPTO_TFM_RES_MASK);
if (unlikely(err)) {
skcipher_set_needkey(tfm);
return err;
}
crypto_skcipher_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
return 0;
}
static int skcipher_crypt_ablkcipher(struct skcipher_request *req,
int (*crypt)(struct ablkcipher_request *))
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
struct ablkcipher_request *subreq = skcipher_request_ctx(req);
ablkcipher_request_set_tfm(subreq, *ctx);
ablkcipher_request_set_callback(subreq, skcipher_request_flags(req),
req->base.complete, req->base.data);
ablkcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
req->iv);
return crypt(subreq);
}
static int skcipher_encrypt_ablkcipher(struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
return skcipher_crypt_ablkcipher(req, alg->encrypt);
}
static int skcipher_decrypt_ablkcipher(struct skcipher_request *req)
{
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
return skcipher_crypt_ablkcipher(req, alg->decrypt);
}
static void crypto_exit_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
{
struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
crypto_free_ablkcipher(*ctx);
}
static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
{
struct crypto_alg *calg = tfm->__crt_alg;
struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
struct crypto_ablkcipher *ablkcipher;
struct crypto_tfm *abtfm;
if (!crypto_mod_get(calg))
return -EAGAIN;
abtfm = __crypto_alloc_tfm(calg, 0, 0);
if (IS_ERR(abtfm)) {
crypto_mod_put(calg);
return PTR_ERR(abtfm);
}
ablkcipher = __crypto_ablkcipher_cast(abtfm);
*ctx = ablkcipher;
tfm->exit = crypto_exit_skcipher_ops_ablkcipher;
skcipher->setkey = skcipher_setkey_ablkcipher;
skcipher->encrypt = skcipher_encrypt_ablkcipher;
skcipher->decrypt = skcipher_decrypt_ablkcipher;
skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) +
sizeof(struct ablkcipher_request);
skcipher->keysize = calg->cra_ablkcipher.max_keysize;
skcipher_set_needkey(skcipher);
return 0;
}
static int skcipher_setkey_unaligned(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
{
@ -786,9 +683,6 @@ static int crypto_skcipher_init_tfm(struct crypto_tfm *tfm)
struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
if (tfm->__crt_alg->cra_type == &crypto_ablkcipher_type)
return crypto_init_skcipher_ops_ablkcipher(tfm);
skcipher->setkey = skcipher_setkey;
skcipher->encrypt = alg->encrypt;
skcipher->decrypt = alg->decrypt;

2
include/crypto/aead.h
View File

@ -321,7 +321,7 @@ int crypto_aead_encrypt(struct aead_request *req);
/**
* crypto_aead_decrypt() - decrypt ciphertext
* @req: reference to the ablkcipher_request handle that holds all information
* @req: reference to the aead_request handle that holds all information
* needed to perform the cipher operation
*
* Decrypt ciphertext data using the aead_request handle. That data structure

75
include/crypto/algapi.h
View File

@ -85,25 +85,6 @@ struct scatter_walk {
unsigned int offset;
};
struct ablkcipher_walk {
struct {
struct page *page;
unsigned int offset;
} src, dst;
struct scatter_walk in;
unsigned int nbytes;
struct scatter_walk out;
unsigned int total;
struct list_head buffers;
u8 *iv_buffer;
u8 *iv;
int flags;
unsigned int blocksize;
};
extern const struct crypto_type crypto_ablkcipher_type;
void crypto_mod_put(struct crypto_alg *alg);
int crypto_register_template(struct crypto_template *tmpl);
@ -202,12 +183,6 @@ static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
}
}
int ablkcipher_walk_done(struct ablkcipher_request *req,
struct ablkcipher_walk *walk, int err);
int ablkcipher_walk_phys(struct ablkcipher_request *req,
struct ablkcipher_walk *walk);
void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
return PTR_ALIGN(crypto_tfm_ctx(tfm),
@ -225,22 +200,6 @@ static inline void *crypto_instance_ctx(struct crypto_instance *inst)
return inst->__ctx;
}
static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
struct crypto_ablkcipher *tfm)
{
return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
}
static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
}
static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
{
return crypto_tfm_ctx_aligned(&tfm->base);
}
static inline struct crypto_cipher *crypto_spawn_cipher(
struct crypto_spawn *spawn)
{
@ -255,23 +214,6 @@ static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
}
static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
struct scatterlist *dst,
struct scatterlist *src,
unsigned int nbytes)
{
walk->in.sg = src;
walk->out.sg = dst;
walk->total = nbytes;
INIT_LIST_HEAD(&walk->buffers);
}
static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
{
if (unlikely(!list_empty(&walk->buffers)))
__ablkcipher_walk_complete(walk);
}
static inline struct crypto_async_request *crypto_get_backlog(
struct crypto_queue *queue)
{
@ -279,23 +221,6 @@ static inline struct crypto_async_request *crypto_get_backlog(
container_of(queue->backlog, struct crypto_async_request, list);
}
static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
struct ablkcipher_request *request)
{
return crypto_enqueue_request(queue, &request->base);
}
static inline struct ablkcipher_request *ablkcipher_dequeue_request(
struct crypto_queue *queue)
{
return ablkcipher_request_cast(crypto_dequeue_request(queue));
}
static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
{
return req->__ctx;
}
static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
u32 type, u32 mask)
{

4
include/crypto/engine.h
View File

@ -83,8 +83,6 @@ struct crypto_engine_ctx {
struct crypto_engine_op op;
};
int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
struct ablkcipher_request *req);
int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
struct aead_request *req);
int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
@ -93,8 +91,6 @@ int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
struct ahash_request *req);
int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
struct skcipher_request *req);
void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
struct ablkcipher_request *req, int err);
void crypto_finalize_aead_request(struct crypto_engine *engine,
struct aead_request *req, int err);
void crypto_finalize_akcipher_request(struct crypto_engine *engine,

2
include/crypto/hash.h
View File

@ -227,7 +227,7 @@ struct crypto_shash {
* CRYPTO_ALG_TYPE_AHASH (listed as type "ahash" in /proc/crypto)
*
* The asynchronous cipher operation discussion provided for the
* CRYPTO_ALG_TYPE_ABLKCIPHER API applies here as well.
* CRYPTO_ALG_TYPE_SKCIPHER API applies here as well.
*/
static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)

12
include/crypto/internal/des.h
View File

@ -117,18 +117,6 @@ static inline int verify_skcipher_des3_key(struct crypto_skcipher *tfm,
return crypto_des3_ede_verify_key(crypto_skcipher_tfm(tfm), key);
}
static inline int verify_ablkcipher_des_key(struct crypto_ablkcipher *tfm,
const u8 *key)
{
return crypto_des_verify_key(crypto_ablkcipher_tfm(tfm), key);
}
static inline int verify_ablkcipher_des3_key(struct crypto_ablkcipher *tfm,
const u8 *key)
{
return crypto_des3_ede_verify_key(crypto_ablkcipher_tfm(tfm), key);
}
static inline int verify_aead_des_key(struct crypto_aead *tfm, const u8 *key,
int keylen)
{

20
include/crypto/internal/skcipher.h
View File

@ -153,17 +153,6 @@ static inline void skcipher_walk_abort(struct skcipher_walk *walk)
skcipher_walk_done(walk, -ECANCELED);
}
static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
int err)
{
req->base.complete(&req->base, err);
}
static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
{
return req->base.flags;
}
static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
@ -182,27 +171,18 @@ static inline u32 skcipher_request_flags(struct skcipher_request *req)
static inline unsigned int crypto_skcipher_alg_min_keysize(
struct skcipher_alg *alg)
{
if (alg->base.cra_ablkcipher.encrypt)
return alg->base.cra_ablkcipher.min_keysize;
return alg->min_keysize;
}
static inline unsigned int crypto_skcipher_alg_max_keysize(
struct skcipher_alg *alg)
{
if (alg->base.cra_ablkcipher.encrypt)
return alg->base.cra_ablkcipher.max_keysize;
return alg->max_keysize;
}
static inline unsigned int crypto_skcipher_alg_walksize(
struct skcipher_alg *alg)
{
if (alg->base.cra_ablkcipher.encrypt)
return alg->base.cra_blocksize;
return alg->walksize;
}

6
include/crypto/skcipher.h
View File

@ -241,9 +241,6 @@ static inline struct skcipher_alg *crypto_skcipher_alg(
static inline unsigned int crypto_skcipher_alg_ivsize(struct skcipher_alg *alg)
{
if (alg->base.cra_ablkcipher.encrypt)
return alg->base.cra_ablkcipher.ivsize;
return alg->ivsize;
}
@ -286,9 +283,6 @@ static inline unsigned int crypto_skcipher_blocksize(
static inline unsigned int crypto_skcipher_alg_chunksize(
struct skcipher_alg *alg)
{
if (alg->base.cra_ablkcipher.encrypt)
return alg->base.cra_blocksize;
return alg->chunksize;
}

435
include/linux/crypto.h
View File

@ -41,7 +41,6 @@
#define CRYPTO_ALG_TYPE_CIPHER 0x00000001
#define CRYPTO_ALG_TYPE_COMPRESS 0x00000002
#define CRYPTO_ALG_TYPE_AEAD 0x00000003
#define CRYPTO_ALG_TYPE_ABLKCIPHER 0x00000005
#define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
#define CRYPTO_ALG_TYPE_KPP 0x00000008
#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
@ -137,7 +136,6 @@
#define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
struct scatterlist;
struct crypto_ablkcipher;
struct crypto_async_request;
struct crypto_tfm;
struct crypto_type;
@ -160,19 +158,6 @@ struct crypto_async_request {
u32 flags;
};
struct ablkcipher_request {
struct crypto_async_request base;
unsigned int nbytes;
void *info;
struct scatterlist *src;
struct scatterlist *dst;
void *__ctx[] CRYPTO_MINALIGN_ATTR;
};
/**
* DOC: Block Cipher Algorithm Definitions
*
@ -180,57 +165,6 @@ struct ablkcipher_request {
* managed via crypto_register_alg() and crypto_unregister_alg().
*/
/**
* struct ablkcipher_alg - asynchronous block cipher definition
* @min_keysize: Minimum key size supported by the transformation. This is the
* smallest key length supported by this transformation algorithm.
* This must be set to one of the pre-defined values as this is
* not hardware specific. Possible values for this field can be
* found via git grep "_MIN_KEY_SIZE" include/crypto/
* @max_keysize: Maximum key size supported by the transformation. This is the
* largest key length supported by this transformation algorithm.
* This must be set to one of the pre-defined values as this is
* not hardware specific. Possible values for this field can be
* found via git grep "_MAX_KEY_SIZE" include/crypto/
* @setkey: Set key for the transformation. This function is used to either
* program a supplied key into the hardware or store the key in the
* transformation context for programming it later. Note that this
* function does modify the transformation context. This function can
* be called multiple times during the existence of the transformation
* object, so one must make sure the key is properly reprogrammed into
* the hardware. This function is also responsible for checking the key
* length for validity. In case a software fallback was put in place in
* the @cra_init call, this function might need to use the fallback if
* the algorithm doesn't support all of the key sizes.
* @encrypt: Encrypt a scatterlist of blocks. This function is used to encrypt
* the supplied scatterlist containing the blocks of data. The crypto
* API consumer is responsible for aligning the entries of the
* scatterlist properly and making sure the chunks are correctly
* sized. In case a software fallback was put in place in the
* @cra_init call, this function might need to use the fallback if
* the algorithm doesn't support all of the key sizes. In case the
* key was stored in transformation context, the key might need to be
* re-programmed into the hardware in this function. This function
* shall not modify the transformation context, as this function may
* be called in parallel with the same transformation object.
* @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt
* and the conditions are exactly the same.
* @ivsize: IV size applicable for transformation. The consumer must provide an
* IV of exactly that size to perform the encrypt or decrypt operation.
*
* All fields except @ivsize are mandatory and must be filled.
*/
struct ablkcipher_alg {
int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen);
int (*encrypt)(struct ablkcipher_request *req);
int (*decrypt)(struct ablkcipher_request *req);
unsigned int min_keysize;
unsigned int max_keysize;
unsigned int ivsize;
};
/**
* struct cipher_alg - single-block symmetric ciphers definition
* @cia_min_keysize: Minimum key size supported by the transformation. This is
@ -415,7 +349,6 @@ struct crypto_istat_rng {
};
#endif /* CONFIG_CRYPTO_STATS */
#define cra_ablkcipher cra_u.ablkcipher
#define cra_cipher cra_u.cipher
#define cra_compress cra_u.compress
@ -483,8 +416,6 @@ struct crypto_istat_rng {
* @cra_exit: Deinitialize the cryptographic transformation object. This is a
* counterpart to @cra_init, used to remove various changes set in
* @cra_init.
* @cra_u.ablkcipher: Union member which contains an asynchronous block cipher
* definition. See @struct @ablkcipher_alg.
* @cra_u.cipher: Union member which contains a single-block symmetric cipher
* definition. See @struct @cipher_alg.
* @cra_u.compress: Union member which contains a (de)compression algorithm.
@ -526,7 +457,6 @@ struct crypto_alg {
const struct crypto_type *cra_type;
union {
struct ablkcipher_alg ablkcipher;
struct cipher_alg cipher;
struct compress_alg compress;
} cra_u;
@ -554,8 +484,6 @@ struct crypto_alg {
#ifdef CONFIG_CRYPTO_STATS
void crypto_stats_init(struct crypto_alg *alg);
void crypto_stats_get(struct crypto_alg *alg);
void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg);
void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg);
void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg);
@ -578,10 +506,6 @@ static inline void crypto_stats_init(struct crypto_alg *alg)
{}
static inline void crypto_stats_get(struct crypto_alg *alg)
{}
static inline void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg)
{}
static inline void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg)
{}
static inline void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
{}
static inline void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
@ -675,18 +599,6 @@ int crypto_has_alg(const char *name, u32 type, u32 mask);
* crypto_free_*(), as well as the various helpers below.
*/
struct ablkcipher_tfm {
int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen);
int (*encrypt)(struct ablkcipher_request *req);
int (*decrypt)(struct ablkcipher_request *req);
struct crypto_ablkcipher *base;
unsigned int ivsize;
unsigned int reqsize;
};
struct cipher_tfm {
int (*cit_setkey)(struct crypto_tfm *tfm,
const u8 *key, unsigned int keylen);
@ -703,7 +615,6 @@ struct compress_tfm {
u8 *dst, unsigned int *dlen);
};
#define crt_ablkcipher crt_u.ablkcipher
#define crt_cipher crt_u.cipher
#define crt_compress crt_u.compress
@ -712,7 +623,6 @@ struct crypto_tfm {
u32 crt_flags;
union {
struct ablkcipher_tfm ablkcipher;
struct cipher_tfm cipher;
struct compress_tfm compress;
} crt_u;
@ -724,10 +634,6 @@ struct crypto_tfm {
void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
};
struct crypto_ablkcipher {
struct crypto_tfm base;
};
struct crypto_cipher {
struct crypto_tfm base;
};
@ -835,347 +741,6 @@ static inline unsigned int crypto_tfm_ctx_alignment(void)
return __alignof__(tfm->__crt_ctx);
}
/*
* API wrappers.
*/
static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast(
struct crypto_tfm *tfm)
{
return (struct crypto_ablkcipher *)tfm;
}
/**
* DOC: Asynchronous Block Cipher API
*
* Asynchronous block cipher API is used with the ciphers of type
* CRYPTO_ALG_TYPE_ABLKCIPHER (listed as type "ablkcipher" in /proc/crypto).
*
* Asynchronous cipher operations imply that the function invocation for a
* cipher request returns immediately before the completion of the operation.
* The cipher request is scheduled as a separate kernel thread and therefore
* load-balanced on the different CPUs via the process scheduler. To allow
* the kernel crypto API to inform the caller about the completion of a cipher
* request, the caller must provide a callback function. That function is
* invoked with the cipher handle when the request completes.
*
* To support the asynchronous operation, additional information than just the
* cipher handle must be supplied to the kernel crypto API. That additional
* information is given by filling in the ablkcipher_request data structure.
*
* For the asynchronous block cipher API, the state is maintained with the tfm
* cipher handle. A single tfm can be used across multiple calls and in
* parallel. For asynchronous block cipher calls, context data supplied and
* only used by the caller can be referenced the request data structure in
* addition to the IV used for the cipher request. The maintenance of such
* state information would be important for a crypto driver implementer to
* have, because when calling the callback function upon completion of the
* cipher operation, that callback function may need some information about
* which operation just finished if it invoked multiple in parallel. This
* state information is unused by the kernel crypto API.
*/
static inline struct crypto_tfm *crypto_ablkcipher_tfm(
struct crypto_ablkcipher *tfm)
{
return &tfm->base;
}
/**
* crypto_free_ablkcipher() - zeroize and free cipher handle
* @tfm: cipher handle to be freed
*/
static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm)
{
crypto_free_tfm(crypto_ablkcipher_tfm(tfm));
}
static inline struct ablkcipher_tfm *crypto_ablkcipher_crt(
struct crypto_ablkcipher *tfm)
{
return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher;
}
/**
* crypto_ablkcipher_ivsize() - obtain IV size
* @tfm: cipher handle
*
* The size of the IV for the ablkcipher referenced by the cipher handle is
* returned. This IV size may be zero if the cipher does not need an IV.
*
* Return: IV size in bytes
*/
static inline unsigned int crypto_ablkcipher_ivsize(
struct crypto_ablkcipher *tfm)
{
return crypto_ablkcipher_crt(tfm)->ivsize;
}
/**
* crypto_ablkcipher_blocksize() - obtain block size of cipher
* @tfm: cipher handle
*
* The block size for the ablkcipher referenced with the cipher handle is
* returned. The caller may use that information to allocate appropriate
* memory for the data returned by the encryption or decryption operation
*
* Return: block size of cipher
*/
static inline unsigned int crypto_ablkcipher_blocksize(
struct crypto_ablkcipher *tfm)
{
return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm));
}
static inline unsigned int crypto_ablkcipher_alignmask(
struct crypto_ablkcipher *tfm)
{
return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm));
}
static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm)
{
return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm));
}
static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm,
u32 flags)
{
crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags);
}
static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm,
u32 flags)
{
crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags);
}
/**
* crypto_ablkcipher_setkey() - set key for cipher
* @tfm: cipher handle
* @key: buffer holding the key
* @keylen: length of the key in bytes
*
* The caller provided key is set for the ablkcipher referenced by the cipher
* handle.
*
* Note, the key length determines the cipher type. Many block ciphers implement
* different cipher modes depending on the key size, such as AES-128 vs AES-192
* vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128
* is performed.
*
* Return: 0 if the setting of the key was successful; < 0 if an error occurred
*/
static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
const u8 *key, unsigned int keylen)
{
struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm);
return crt->setkey(crt->base, key, keylen);
}
/**
* crypto_ablkcipher_reqtfm() - obtain cipher handle from request
* @req: ablkcipher_request out of which the cipher handle is to be obtained
*
* Return the crypto_ablkcipher handle when furnishing an ablkcipher_request
* data structure.
*
* Return: crypto_ablkcipher handle
*/
static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
struct ablkcipher_request *req)
{
return __crypto_ablkcipher_cast(req->base.tfm);
}
/**
* crypto_ablkcipher_encrypt() - encrypt plaintext
* @req: reference to the ablkcipher_request handle that holds all information
* needed to perform the cipher operation
*
* Encrypt plaintext data using the ablkcipher_request handle. That data
* structure and how it is filled with data is discussed with the
* ablkcipher_request_* functions.
*
* Return: 0 if the cipher operation was successful; < 0 if an error occurred
*/
static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
{
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
struct crypto_alg *alg = crt->base->base.__crt_alg;
unsigned int nbytes = req->nbytes;
int ret;
crypto_stats_get(alg);
ret = crt->encrypt(req);
crypto_stats_ablkcipher_encrypt(nbytes, ret, alg);
return ret;
}
/**
* crypto_ablkcipher_decrypt() - decrypt ciphertext
* @req: reference to the ablkcipher_request handle that holds all information
* needed to perform the cipher operation
*
* Decrypt ciphertext data using the ablkcipher_request handle. That data
* structure and how it is filled with data is discussed with the
* ablkcipher_request_* functions.
*
* Return: 0 if the cipher operation was successful; < 0 if an error occurred
*/
static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
{
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
struct crypto_alg *alg = crt->base->base.__crt_alg;
unsigned int nbytes = req->nbytes;
int ret;
crypto_stats_get(alg);
ret = crt->decrypt(req);
crypto_stats_ablkcipher_decrypt(nbytes, ret, alg);
return ret;
}
/**
* DOC: Asynchronous Cipher Request Handle
*
* The ablkcipher_request data structure contains all pointers to data
* required for the asynchronous cipher operation. This includes the cipher
* handle (which can be used by multiple ablkcipher_request instances), pointer
* to plaintext and ciphertext, asynchronous callback function, etc. It acts
* as a handle to the ablkcipher_request_* API calls in a similar way as
* ablkcipher handle to the crypto_ablkcipher_* API calls.
*/
/**
* crypto_ablkcipher_reqsize() - obtain size of the request data structure
* @tfm: cipher handle
*
* Return: number of bytes
*/
static inline unsigned int crypto_ablkcipher_reqsize(
struct crypto_ablkcipher *tfm)
{
return crypto_ablkcipher_crt(tfm)->reqsize;
}
/**
* ablkcipher_request_set_tfm() - update cipher handle reference in request
* @req: request handle to be modified
* @tfm: cipher handle that shall be added to the request handle
*
* Allow the caller to replace the existing ablkcipher handle in the request
* data structure with a different one.
*/
static inline void ablkcipher_request_set_tfm(
struct ablkcipher_request *req, struct crypto_ablkcipher *tfm)
{
req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base);
}
static inline struct ablkcipher_request *ablkcipher_request_cast(
struct crypto_async_request *req)
{
return container_of(req, struct ablkcipher_request, base);
}
/**
* ablkcipher_request_alloc() - allocate request data structure
* @tfm: cipher handle to be registered with the request
* @gfp: memory allocation flag that is handed to kmalloc by the API call.
*
* Allocate the request data structure that must be used with the ablkcipher
* encrypt and decrypt API calls. During the allocation, the provided ablkcipher
* handle is registered in the request data structure.
*
* Return: allocated request handle in case of success, or NULL if out of memory
*/
static inline struct ablkcipher_request *ablkcipher_request_alloc(
struct crypto_ablkcipher *tfm, gfp_t gfp)
{
struct ablkcipher_request *req;
req = kmalloc(sizeof(struct ablkcipher_request) +
crypto_ablkcipher_reqsize(tfm), gfp);
if (likely(req))
ablkcipher_request_set_tfm(req, tfm);
return req;
}
/**
* ablkcipher_request_free() - zeroize and free request data structure
* @req: request data structure cipher handle to be freed
*/
static inline void ablkcipher_request_free(struct ablkcipher_request *req)
{
kzfree(req);
}
/**
* ablkcipher_request_set_callback() - set asynchronous callback function
* @req: request handle
* @flags: specify zero or an ORing of the flags
* CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and
* increase the wait queue beyond the initial maximum size;
* CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep
* @compl: callback function pointer to be registered with the request handle
* @data: The data pointer refers to memory that is not used by the kernel
* crypto API, but provided to the callback function for it to use. Here,
* the caller can provide a reference to memory the callback function can
* operate on. As the callback function is invoked asynchronously to the
* related functionality, it may need to access data structures of the
* related functionality which can be referenced using this pointer. The
* callback function can access the memory via the "data" field in the
* crypto_async_request data structure provided to the callback function.
*
* This function allows setting the callback function that is triggered once the
* cipher operation completes.
*
* The callback function is registered with the ablkcipher_request handle and
* must comply with the following template::
*
* void callback_function(struct crypto_async_request *req, int error)
*/
static inline void ablkcipher_request_set_callback(
struct ablkcipher_request *req,
u32 flags, crypto_completion_t compl, void *data)
{
req->base.complete = compl;
req->base.data = data;
req->base.flags = flags;
}
/**
* ablkcipher_request_set_crypt() - set data buffers
* @req: request handle
* @src: source scatter / gather list
* @dst: destination scatter / gather list
* @nbytes: number of bytes to process from @src
* @iv: IV for the cipher operation which must comply with the IV size defined
* by crypto_ablkcipher_ivsize
*
* This function allows setting of the source data and destination data
* scatter / gather lists.
*
* For encryption, the source is treated as the plaintext and the
* destination is the ciphertext. For a decryption operation, the use is
* reversed - the source is the ciphertext and the destination is the plaintext.
*/
static inline void ablkcipher_request_set_crypt(
struct ablkcipher_request *req,
struct scatterlist *src, struct scatterlist *dst,
unsigned int nbytes, void *iv)
{
req->src = src;
req->dst = dst;
req->nbytes = nbytes;
req->info = iv;
}
/**
* DOC: Single Block Cipher API
*